5-(吡啶-3-基)-2-(对甲苯基)恶唑 | 1020264-31-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 中文名称: 5-(吡啶-3-基)-2-(对甲苯基)恶唑
• 英文名称: 5-(Pyridine-3-yl)-2-(p-tolyl)oxazole
• 英文别名: 3-(2-p-tolyloxazol-5-yl)pyridine；2-(4-Methylphenyl)-5-pyridin-3-yl-1,3-oxazole
• CAS: 1020264-31-6
• 化学式: C₁₅H₁₂N₂O
• 分子量: 236.273
• InChiKey: MBZLYGIOGNHVPY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  18
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.07
• 拓扑面积：
  38.9
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  5-苯基恶唑 、 4-碘甲苯 在 copper(l) iodide 、 2,6-(iPr2PO)(C6H3)(CH2-NiPr2)PdCl 、 caesium carbonate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 16.0h， 以86%的产率得到5-(吡啶-3-基)-2-(对甲苯基)恶唑
  参考文献：
  名称：

  POCN-pincer钯催化剂的设计与开发，用于唑类与芳基碘化物的C–H键芳构化†

  摘要：

  已经开发出定义明确且有效的POCN连接的钯络合物，用于将唑类与芳基碘化物直接进行C–H键芳基化。的膦酸酯-胺配体钳形1-（R 2 PO）-C 6 H ^ 4 -3-（CH 2 Ñ我镨2）[ R 2 POCN IPR2 -H; R = i Pr（1a），R = t Bu（1b）]和相应的钯配合物{2-（R 2 PO）-C 6 H 3 -6-（CH 2 N i Pr 2）} PdCl [（R2 POCN iPr2氯化钯; R = i Pr（2a），R = t Bu（2b）]以高收率合成。用KI和AgOAc处理钯配合物2a分别得到配合物（iPr2 POCN iPr2）PdI（3a）和（iPr2 POCN iPr2）Pd（OAc）（4a）。类似地，2a与苯并噻唑基-锂的反应以定量收率产生了（iPr2 POCN iPr2）Pd（苯并噻唑基）（5a）络合物。夹钯复合物2a在CuI作为助催化剂的条件下，

  DOI：

  10.1039/c4dt01547a

文献信息

• Direct arylations on water: synthesis of 2,5-disubstituted oxazoles balsoxin and texaline
  作者：Stephan A. Ohnmacht、Patrizia Mamone、Andrew J. Culshaw、Michael F. Greaney

  DOI：10.1039/b719466h

  日期：——

  An efficient two-step palladium catalysed synthesis of 2,5-disubstituted oxazoles is reported.

  报告了一种高效的二步钯催化合成2,5-二取代恶唑的方法。
• Mechanistic Insights into Pincer-Ligated Palladium-Catalyzed Arylation of Azoles with Aryl Iodides: Evidence of a Pd^II–Pd^IV–Pd^II Pathway
  作者：Shrikant M. Khake、Rahul A. Jagtap、Yuvraj B. Dangat、Rajesh G. Gonnade、Kumar Vanka、Benudhar Punji

  DOI：10.1021/acs.organomet.6b00003

  日期：2016.3.28

  Pincer-based ((POCNR,2)-P-R2)PdCl complexes, along with CuI cocatalyst catalyze the arylation of azoles with aryl Iodides to give the 2-arylated azole products:Herein; we report an extensive mechanistic investigation for the direct arylation of azoles involving a well-defined and highly efficient ((POCNEt2)-P-iPr2)PdCl (2a) catalyst, which emphasizes a rare Pd-II-Pd-IV-Pd-II redox catalytic pathway. Kinetic studies and deuterium labeling experiments indicate that the C-H bond cleavage on azoles occurs via two distinct routes in, a reversible manner. Controlled reactivity of the catalyst 2a underlines the iodo derivative ((POCNEt2)-P-iPr2)PdI (3a) to be the resting state of the catalyst. The intermediate species ((POCNEt2)-P-iPr2)Pd-benzothiazolyl (4a) has been isolated and structurally, characterized. A determination of reaction rates of compound 4a with electronically different aryl iodides has revealed the kinetic significance of the oxidative addition of the C(sp(2))-X electrophile, aryl iodide, to complex 4a. Furthermore, the reactivity behavior of 4a suggests that the arylation of benzothiazole proceeds via an oxidative addition/reductive elimination pathway involving a ((POCNEt2)-P-iPr2)Pd-IV(benzothiazolyl)(Ar)I species, which is strongly supported by DFT calculations.